Gilley, Frank M · Boston, Allyn & Bacon · leaf 125
ion, or the height that W is raised, equals ^ inch. Kead the spring bal-■^ ance as E is slowly- turned, keeping thestring at E perpendic-ular to DS. The springbalance measures thepower applied. Calcu-late what weight shouldbe lifted without fric-tion, and compare withthe weight actually-raised. In… … Fig. 122. 128. Couples.—Two tugs, E and W, Fig. 123, press withequal force against a steamer, S, which is not working its ownengines. E pushes at the bow toward the east, and W at thestern toward the west. The effect is toturn the steamer around without moving herto a different place. What would be…
Physics
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